Valve grinding and reseating tool



1.71. MCMEEMN. VALVE GRINDING AND RESEATING TOOL.

APPLICATION FILED JLNE 25.1919.

Patented Dea` 30, 1919.

UNITED sTATEs PATENT oEEioE.

THOMAS J'. MCMEEKIN, OF JACKSONVILLE, FLORIDA.

VALVE GRINDING AND RESEATING TOOL.

To all w iwf/nt may .concern Be it known that I, THOMAS J. MCMEEKIN, a citizen of the United States, residing at Jacksonville, in the county of Duval and State of Florida, have invented a new and useful Valve Grinding and Reseating Tool, of which the following is aspecilication.

This invention relates to improvements in valve grinding and vreseating tools, the ob ject of the invention `being to provide an improved tool of this characterwhereby ,the operator can stand in an upright position while grinding the valve and in which the pressure on the valve is uniform, and which tool can be easily raised to permit the application of grinding material without interfering with the adjustment of the grinder.

A further object of the invention is to provide a tool of the characterset forth having a permanent magnet for lifting the valve from its seat.

A further object of the invention is to 4provide a tool which is rigidly supported when in operation, is comparatively simple in construction, consists of but few parts, is easily assembled and highly eiiicient in use.

lVith the foregoing and other objects in view, which will appear as the description proceeds, the invention consists in the novel features of construction and combination of parts which will be more fully described hereinafter and particularly pointed out in the claims.

In the drawings accompanying and forming part of this specification,

Figure 1 is a side elevation, partly in section, showing my improved grinder applied to the cylinder head of a gas engine;

Fig. 2 is a bottomplan view of the grinder shown in Fig. y1; and

Fig. 3 is a side elevation of a reseating tool adapted for use with my improved grinder frame.

The same characters of reference 'designate the same parts in the different figures of the drawings.

Referring to the drawings, 2 designates an approximately U-shaped supporting member having a pair of horizontally extending arms 3, through which extends a stud bolt 1, which is threaded at both ends. The lower end of the bolt is adapted to be threaded into one of the bolt holes usually formed in the cylinder head 5 of a gas engine, the bolt being provided with a shoulder 6 for .rigidly clamping the same in engagement with the Specification of Letters Patent. Pate11ted])e 30, 1919, Application led June 25, 1919.

Serial No. 306,550.

Vcylinder head and permitting the use of a end with a wing nut `8 by means of which the upper horizontally extending arm 3 of the U'shaped supporting member is clamped in place- The arms 3 are providedat their free ends with registering openings adapted to form bearings in which is mounted for rotation a vertical spindle 9 carrying at its lower end a valve-engaging 4shoe 10, which may be made either to lit the slot in the valve or provided with downwardly extending prongs 11 adapted to engage the depressions at diametrically opposite points in the up per face of the valve 12. The lower horizontal arm 3 is seated on the shoulder 6 in order to provide sufficient space between the free end of the arm and the valve for 4the shoe 10. The AAspindle is provided at its op* posite end with a transverse opening through i which is adapted to pass a cotter pin 13 for preventing vertical movement of the spindle. For rotating the spindle a drum or spool 14 is removably7 secured thereto by means of a pin 15 passing through registering openings in the drum and spindle. A cord 16 is wound around the drum for the purpose of rotating the same, the operator taking hold of the ends of the cord and pulling first with one hand and then with the other, thereby to alternately rotate the `spindle in opposite directions. A spring 17 eneircles the spindle above the drum 14, one end thereof being seated on the upper end of the drum while the opposite end abuts against a flange 18 carried by a sleeve 19, through which the spindle passes, the iiange 18 abutting at itsl upper side against the underside of the upper horizontal arm 3. Bythis construction the tension of the spring is exerted on the drum thereby to maintain theshoe 10 in iirm engagement with the valve. For the purpose of adjusting the tension` of kthe Aspring I have provided an opening 20 above described in place of such bolt. The wing nut 8 is then released to permit the arms to be swung to the proper position to allow the spindle 9 to be centered over the valve, whereupon the shoe 10 is `placed in engagement with the valve and the wing nut 8 again clamped on the arm 3 to retain it in position. The ends of the cord 16 are then grasped by the operator and pulled in the manner described, this operation being continued until the valve is properly ground to its seat. The cord may be or' any desired length, and it will thus be seen that the valve may be ground without the necessity of the operator applying either hand to the grinder, thus avoiding a cramped position of the body. It will also be observed that the pressure on the valve is equally disA tributed around the same, since the tension of the spring is placed on the drum and the power which rotates the drum is not a swinging motion.

I have` provided a valve rese-ating tool adapted for use withl the supporting frame above described. This tool consists of a member 21 ot approximately the shape ot' the valve and provided around its periphery with the proper serrations for cutting the valve seat. This member is rigidly secured to a spindle or stem 22 the lower end of which is adapted to extend into the cylinder in the same manner as the valve stem, said spindle being extended upward to a suflicient height to project above theupper horizontal arm 3 and provided with a transverse opening through which is adapted to pass a short bar 24 by means of which rotation alternately in opposite directions, as well as pressure, may be imparted to the tool for properly grinding the valve seat. Then it is desired to use this tool., the valve is taken out and the spindle 9 removed from the supporting arms The spindle 22 ot the reseating tool is then substituted in place of the spindle 9, the tool 21 being seated in the valve seat. The wing nut 8 is then tightened so as to rigidly hold the supporting trame and the operator grasps the bar Q4 and rocks the same alternately in opposite directions, while exerting pressure thereon, although it is to be understood that the stem 22 may be applied and used in the same manner as the spindle 9.

While I have described in detail the structure herein illustrated, it is to be understood that I do not thereby limit my invention to the precise features oit' construction shown, as I am aware that many mechanical changes and Inodiications may be made therein without departing from tnhe spirit and scope of the invention as set forth in the claims hereto appended.

Having thus described my invention, what I claim is:

l. A device ot' the class described, comprising a U-shaped supporting member having a pair of horizontally extending arms, a bolt passing through said armsand carrying means for locking one of the arms adjacent 'to one end of said bolt, means at the opposite end of the bolt tor rigidly securing` the same toa cylinder head, said locking means limiting the displacement ot the bolt in the head ot a cylinder, said arms carrying at their free ends registering bearings, a vertical spindle adapted to be removably mounted for rotation in said bearings and carrying means tor rotating the spindle and means for exerting pressure in the direction of the length thereof in engagement with the valve, means on the spindle for regul ating the pressure exerting means, and a valve- 4 engaging member carried by said spindle at one end thereo'l. v

Q. A device of the class described, com-` prising a U-shaped supporting member having a pair of horizontally extending arms, a bolt passing through said arms and threaded at its opposite ends, a shoulder secured on said bolt adjacent to one end thereof and adapted to rigidly secure said bolt in a cylinder head and forming a seat for one of said arms, a wing nut threaded on the opposite end of the bolt and adapted to clamp the other arm, said arms carrying at their tree ends registering bearings, a spindle adapted to be removably mounted for rotation in said bearings, a drum removably secured to said spindle to turn therewith, a spring encircling the spindle between the upper arm and the drum and adapted to exert tension on said drum, and a cord wound on said drum and having the ends thereof `free for rotating the drum substantially in the manner as and for the purpose set forth.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

THOMAS J. MCMEEKIN. Witnesses: p y R. PEARsoN, W. J. DENBY. 

